Quote from: Red on August 10, 2010, 02:22:09 PM
By the way, this is the way most digital notary services work. You send them a hash of a signed document and they log it permanently. Then they create a hash chain like bitcoin does. They periodically publish the current hash chain value in a newspaper or other offline redundant record.
You don’t have to send your private documents/transaction to the notary for them to be time stamped and recorded. The notary is just certifying that something that matched this hash existed at this point in time.
You also don’t have to prove to the notary that you have X BTC in your account to spend.
Although I was recently reading about Zero-knowledge proofs if you could use something like that to prove that your account had X BTC in it without revealing anything else it might be what you’re looking for.
I’m just worried what you want is theoretically impossible.